Maples are one of the most beloved and popular shade trees in St. Paul and the wider Twin Cities area, known for their vibrant fall color and curb appeal. St. Paul’s public tree inventory includes 32 genera and 65 species, with ash and maple dominating the streets, parks, and public property.
Unfortunately, the city lost one-third of its urban trees to Emerald Ash Borer, creating a significant need for new tree planting and proper canopy care across the city, especially for its maples.
Maples need more than basic planting. Proper pruning, especially in the early years, is what determines long-term health and structure. Davey’s St. Paul office and its ISA-certified arborist team can provide expert insight on maple care across the St. Paul metro area, including Dakota County.
What Makes Young Maple Trees Struggle in St. Paul: Road Salt, Clay Soil, and Harsh Minnesota Winters
St. Paul falls in USDA hardiness zones 4b through 5a, which supports a wide range of maple species that can easily adapt to Minnesota’s cold winters and warm summers, including sugar, red, silver, and Norway maples, and hybrid cultivars like Autumn Blaze. Minnesotans also love maples because of their unmatched fall color and fast establishment.
By mid-century, the Southwestern Twin Cities metro area is projected to have 15 to 25 extra days above 90 degrees Fahrenheit per year, making proper tree care and canopy health more urgent than ever for communities like St. Paul. In winter seasons, road salt runoff from St. Paul metro roads enters lakes, streams, and soils, posing a direct threat to street trees like maples.
Heavy clay soil, freeze-thaw cycles, and periodic drought are other common stressors for young maples in the area. With the right care, these stressors are very manageable. Left unaddressed, they can cause serious decline.
Learn the early warning signs of maple decline, and see the most common problems affecting maples in the St. Paul area.
How and When to Prune Young Maple Trees in St. Paul
The pruning decisions made in the first 3 to 5 years of a maple's life determine its structure, strength, and safety for decades. According to the city’s Urban Forest Management Plan, the city of South St. Paul aims for its young trees to be on a training pruning cycle for about 3 years.
Getting ahead of structural issues while the tree is young is always easier and less costly than corrective work on a mature tree.
Why the First 5 Years of Maple Pruning Are the Most Important and What Happens If You Skip Them in Minnesota
Structural pruning on young maples establishes a dominant central leader, or main shoot, in the center of the tree. It eliminates co-dominant stems before they become a hazard and creates well-spaced scaffold branches that can carry the weight of a full canopy. If you skip early pruning, it can become risky.
"Young maples that aren’t pruned often develop weak, narrow branch unions that split under the weight of Minnesota’s ice and snow loads, creating liability issues for homeowners."
Luckily, proper early pruning avoids the need to remove large limbs. It’s less about the volume of what’s being cut off and more about avoiding large-diameter cuts. This also avoids large, vulnerable cuts that can become entry points for decay pathogens.
When Is the Best Time to Prune Young Maple Trees in South St. Paul?
The city of South St. Paul’s boulevard tree pruning ordinance requires timing that follows schedules recommended by a certified arborist.
Unlike oaks and elms, pruning timing for maples is much more flexible. Pruning in the dormant season versus summertime has pros and cons. In general, the most important thing is to prune hazardous maples before storm season to reduce risk.
Some arborists prefer pruning sappy trees like maples in summer to avoid spring bleeding. Learn when summer pruning works.
Heavy structural pruning in late spring, once leaves are fully out, stresses the tree.
You can remove dead, damaged, or hazardous branches at any time of year.
Wondering if you missed the dormant window? Here’s what’s safe to prune in spring.
When to Call a Professional Instead of DIYing
Small branches close to the ground are safe to prune with hand pruners or loppers yourself, but any cut above shoulder height, near utility lines, or requiring a ladder introduces serious safety risks and requires a certified arborist to handle.
Davey’s St. Paul offices employ certified arborists who can prune trees safely and efficiently. Learn more about Davey’s local offices here.
Caring for Autumn Blaze Maple Trees in St. Paul
Autumn Blaze is one of the most widely planted shade trees in St. Paul and the Twin Cities. It’s a hybrid of silver and red maple bred for fast growth and brilliant fall color.
Read on to learn what makes Autumn Blaze special and what it needs to stay healthy long-term.
Why Autumn Blaze Maples Are So Popular
What makes Autumn Blaze a go-to choice for St. Paul homeowners? Reasons include:
Fast growth – Autumn Blaze grows up to 3 feet per year, providing meaningful shade in just a few growing seasons.
Exceptional fall color – Blazing orange-red foliage arrives earlier in the season than most other maples.
Cold hardiness and adaptability – Autumn Blaze is fit for hardiness zones 3-8 and tolerates the heavy clay soil commonly found in the South St. Paul metro area.
Low disease pressure – A key reason for its popularity as an urban landscape tree is its general resistance to the pests and diseases that trouble other maple species.
Pruning Autumn Blaze Maples
A disadvantage to Autumn Blaze’s fast growth is that structural problems can develop quickly. A tree that goes unpruned for a few years can develop issues that would take decades in slower-growing species.
It’s tempting to top a fast-growing Autumn Blaze, but topping is never the answer. It creates weak shoots that grow back faster, permanently weakening structure, and opens large wounds to decay.
South St. Paul's own tree management plan aims that at least 418 of its 2,090 larger trees be cleaned and structurally pruned each year during the routine maintenance cycle. The goal is to prune established trees on a five year cycle. This makes proactive pruning central to the city's urban forest strategy.
Ready to Schedule Maple Tree Pruning in St. Paul?
Whether you have a young maple needing early structural work or an established Autumn Blaze due for routine pruning, Davey's St. Paul team is ready to help. Davey offers free consultations where an arborist comes to your property and provides a clear plan and transparent estimate.
FAQs for St. Paul Homeowners
Unlike oaks and elms, pruning timing for maples is much more flexible. Pruning in the dormant season versus summertime has pros and cons. In general, the most important thing is to prune hazardous maples before storm season to reduce risk. Dormant pruning allows wounds to close quickly as the growing season starts, reducing exposure to insects and disease that are inactive during the winter.
Prune a young maple tree about every 3 years in its first decade to establish strong branch architecture.
While the time of year for pruning remains the same, pruning cycles may need to be shorter, or trees may need to be pruned more frequently to avoid structural issues. Avoid topping an Autumn Blaze, as it creates weak shoots that grow back faster, permanently weakening structure, and opens large wounds to decay.
Avoid heavily pruning trees in the summer, unless the branches are dead, decaying, or pose a safety risk. Removing a few small branches should be okay with proper practices.
Autumn Blaze’s fast growth means structural problems can develop quickly. Make sure to prune Autumn Blazes regularly to avoid ice and snow damage, among other issues.